Use switch on pseudovector types; plus cleanups along the way

Use switch on pseudovector types; plus cleanups along the way

* src/lisp.h (PSEUDOVECTOR_TYPE): New function, extracted from mark_object.
(PSEUDOVECTOR_TYPEP): Change type of `code'.

* src/alloc.c (sweep_vectors): Remove out-of-date assertion.
(mark_object): Use PSEUDOVECTOR_TYPE.

* src/data.c (Ftype_of): Use switch on pvec type.

* src/print.c (print_object): Use switch on pvec type.

* lisp/emacs-lisp/cl-generic.el (cl--generic-typeof-types):
Add recently added types.